Bromochloromethane
Harris County Municipal Utility District 189
Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and as a fire extinguishing agent. Disinfection byproducts in drinking water increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2015 | ND | 4 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | 1.03 ppb | 3 | 1 | ND - 3.10 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.06 ppb
The EWG Health Guideline of 0.06 ppb for bromochloromethane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer, harm to reproduction and child development, and change to fetal growth and development.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-06-09 | 113685P | ND |
| 2015-06-09 | 113686P | ND |
| 2015-12-08 | 116314P | ND |
| 2015-12-08 | 116315P | ND |
| 2018-05-17 | AE26817 | ND |
| 2018-05-17 | AE26821 | ND |
| 2019-07-08 | AE73468 | ND |
| 2019-07-08 | AE73470 | ND |
| 2020-06-23 | AF16542 | ND |
| 2020-06-23 | AF16548 | ND |
| 2021-10-14 | AF73563 | ND |
| 2022-04-05 | AF92017 | ND |
| 2023-07-20 | AG49613 | 3.10 ppb |
| 2023-10-12 | AG59736 | ND |
| 2023-11-02 | AG62177 | ND |